The propene catalytic oxidation was studied over an 11-layers porous electrochemical reactor made by La0.85Sr0.15MnO3 and Ce0.9Gd0.1O1.95 with the objective to simulate the abatement of exhaust gases emitted from Diesel engines. This work shows the possibility to enhance the catalytic activity through infiltration of Ce0.9Gd0.1O1.95 using the porous electrochemical reactor as a catalyst support. The infiltration of an oxygen ion conductor as Ce0.9Gd0.1O1.95 showed an increased activity either at open circuit voltage (OCV) or under polarization with respect to the non infiltrated cell. The use of infiltration permitted to maintain high the effect of polarization also at low temperatures. The electrode was found to be strongly affected by morphology of infiltrated material and long term polarization brought about to an increase of catalytic activity. Moreover the phenomenon of electrochemical promotion of catalysis (EPOC) was found at low temperature.
Journal of the Electrochemical Society, 2012, Vol 159, Issue 6
LSM; CGO; Infiltration; AC impedance; EPOC; NEMCA; Propene oxidation